camshift.py description

samples/python2/camshift.py

@@ -1,16 +1,29 @@
+'''
+Camshift tracker
+================
+
+This is a demo that shows mean-shift based tracking
+You select a color objects such as your face and it tracks it.
+This reads from video camera (0 by default, or the camera number the user enters)
+
+http://www.robinhewitt.com/research/track/camshift.html
+
+Usage:
+------
+    camshift.py [<video source>]
+
+    To initialize tracking, select the object with mouse
+  
+Keys:
+-----
+    ESC   - exit
+    b     - toggle back-projected probability visualization
+'''
+
 import numpy as np
 import cv2
 import video
 
-help_message = '''USAGE: camshift.py [<video source>]
-
-Select a bright colored object to track.
-
-Keys:
-  ESC   - exit
-  b     - toggle back-projected probability visualization
-'''
-
 
 class App(object):
     def __init__(self, video_src):
@@ -99,6 +112,6 @@ if __name__ == '__main__':
     import sys
     try: video_src = sys.argv[1]
     except: video_src = 0
-    print help_message
+    print __doc__
     App(video_src).run()